Study On Hydrodynamic Numerical Simulation And Experiment Of Tuna Boat

Tuna fishing boat is different from other types of ship in cymbiform. It has a much higher speed. It belongs to‘consuming ship type’, which costs more oil than other types.Rapidity is one of the most important functions of the ship. It partly affects the economy and usage of the tuna fishing boat. It’s necessary to study its hydrodynamicperformance in order to improve the rapidity.This paper depends on the numerical simulation and the towing trial, then combines it with the theory of hydrodynamics to research the effect of this special ship type to the hydrodynamic performance of viscous flow further.This paper first makes some introductions of the international research status of the vessel’s hydrodynamic performance.Afterwards, it puts forward the research approach of hydrodynamic numerical simulation and experiment about tuna boat. This research takes the SIMPLE algorithm to solve the RANS equation, then numerical simulates the viscous flow field around the ship model and calculates resistance of the ship model.After that through numerical simulating the viscous flow field of the ship model Wigley, the paper compares the ship model resistance and the graph of the water height on the surface of the water line with the test results in order to confirm the feasibility of the numerical method put forwards in this paper.Then, it numerical simulates the ship model’s hydrodynamic performance in the flow field, and analyzes the hydrodynamic performance of flatbulb bow in the fields of different velocity.Finally, by using the towing tank in the fishing gear and hydrodynamic laboratory, it conducts a towing trial of the model Wigley and compares the results of test with that of numerical simulation. It also confirms the feasibility of both of the test and the numerical simulation, then concludes the cause of the error. Additionally, through the appendage resistance test, it estimates the resistances of full-scale ship of different velocity.